Ventilating apparatus



June 6 1939. H. C. HUEGLIN VENTILATING APPARATUS Filed Se t. 18' 1936 2Sheets-Sheet 2 0f the top 10uvre eleInent internitting with said groovein Said ange depending from said upper fran1e Inen1be1; and bearing pinsextending inwardly fron1 Said side nlenbers in Said recessed portionsint0 the ends 0f the ridges on said louvre elelnents for rotatablynlounting them about axes substantial]y coplanar with the outer surfacesof S3jid nanges 2. A louvre con1prising, in con1bination a rectangularfrane dening an ail' duct and in cluding an upper and a lower fra'memember, said 10Wer frIne Ineznber being wider than said upper framemember, Said upper frame member having a depending 1ange with a10ngitudinal gr00ve opening outvvardly, said lovver fra!ne member havingan upstanding 1ange, and a pair of side members tapering from a width atthe bottom corresponding to the width of said lower frame member to awidth at the top C01' responding to the width of said upper frameIne!nber each of Said side Inenlbers having an invvardly extendingflange parauel to the outer edges there0f having oppositely positionedSpaced apart recessed portions, the outer sur faces of said 1angeS beingsubsta1tia11y d() p1ana and the plane containing the!n being slightlyinclined froIn the plane including the rear edges of Said fra!neInembers; a plurality of 10uvre elenlents disposed in overlappingrelation between said si-de Inen!bers; a ridge ha'ving apertured endsextending along the upper edge and on the side of each of said louvreelenlents on which the air impinges, thereby permitting SuTfaceoverlapping engagenlent betvveen adjacent upper and 10vver portionsthere0f. the ridge of the lop louvre element interfitting 'ith saidgroove in Said flange depending fron1 said upper frarne nlen1ber; andbearing pins extending invvardly fron1 Said side nenbers in Saidrecessed portions into said apertured ends of the ridges on said louvreelenlents for rotatably n10unting theln about axes substantiallycoplanar with the outer Surfaces of said flanges` HERMAN C HTEGJN`

